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| MC68HC908GR16 Datasheet, PDF (218/276 Pages) Motorola, Inc – Microcontrollers | |||
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Timebase Module (TBM)
TMBCLKSEL
FROM CONFIG2
CGMXCLK
FROM CGM MODULE
DIVIDE BY 128
PRESCALER
÷2 ÷2 ÷2
÷2
÷2
÷2
÷2
0
TBMCLK
1
TBON
TBMINT
÷2 ÷2 ÷2 ÷2
÷2 ÷2
÷2 ÷2
000
R
001
010
011
100
101
110
111
Figure 17-1. Timebase Block Diagram
17.5 TBM Interrupt Rate
The interrupt rate is determined by the equation:
tTBMRATE
=
---------------1-----------------
fTBMRATE
=
----D-----i-v----i-d----e----r----
fTBMCLK
where:
fTBMCLK =Frequency supplied from the clock generator (CGM) module
Divider = Divider value as determined by TBR2âTBR0 settings, see Table 17-1
TBIF
TBIE
MC68HC908GR16 Data Sheet, Rev. 5.0
218
Freescale Semiconductor
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